Weighing scale



Dec. 20, 1932. N. A. HALLWOOD WEIGHING SCALE Filed May 28, 1931 15 V t8il,973, iiled Sept. 29, 1930.

y ppatentvediec. 20, 1932k 'i Y. y. i i y p f yPATENT OFFlcE kixrn'rrniivn. nnLLvvoon, ooLUiuBUs, oil-Idro y i i t l WEIGHING SCALE` f y' applicati@ :med May as, 1931. swarm. 540,663. K

This invention relates to improvements in It is also an object of the'inventiofn to sim- Weighing scales of ythe `so-called veven :pliry generally the constructionof even balybalance.7 type wherein the scale beam is ance ltypes of scalesand improve their operapivotally mounted intermedia'tely of its ends tion Aaswell as Widen'their vscope of use. from'the stationary scale base and -wherein With these and other objects in view, Athe beam, on oneside of its pivotal orrulcrum whichv will appear as the description pro- Lmounting, receives a knownk Weight and on ceeds, the invention consists in thenovel feathe opposite side of said mounting receives "tures of construction, combinations of eley the commodity to be weighed or the unknown ments and arrangements of parts hereinafter Weight, the said beam when balanced profully described and pointed out in the subyviding for proper Weight indications. y joined claims..k

The present invention constitutes acon- In the accompanying draWingf Y tinuation in part of the disclosure set forth Figure lis a view in verti'wl section of a in my copending application Serial Number Weighing scale constructed in accordance y n With the features of the `present invention, @l5

In my aforesaid application, there 1s set j Figure 2 is a'horizontal sectional'vie'w forth an even balance scale of the character taken on the plane indicated the line 2442 referred to but'vvhereinthe known Weight is of lFigure 1,y i i mounted onthe scale'beam on one side thereof f Figure 3 is asimiliar view taken on the 20 and provided With means for adjusting the line 3 -3 or Figure l, and I f Weight lOlg-UdlllllyO the beam toward Figure 4 is an enlarged detail sectional View and away lOm its fUlClUll mounting, Wlleltaken through the pivotal connection'of the by the 4scale may be employed for Welghllg auxiliary beam and the base of saidscale commodities ofvayng WghtS Without @H1- p'Referring more particularly to the drawploying the usual removably applied fXed ing, the numerall designates the base of my .5

0I' kUOWn WeiglltSyWhCh have h 1:tOf01"G improved scale. Arranged on top ofthebase been characteristically employed 111 @Yell is an open bottom Weight indicating to'ver y2.

balance scales. In my aforesaid application, Supported by the base` l and. extending f the'rveighing capacity of -the scale is limited throughopenings 3 'formed inthe ksidewalls 30 for the reason that the beam is short iIi length of the tovver is a stationary yoke 4 vvhichhas .80

4,a5 @stable Weight by ywhich the capacity of they *weighed yon ythe scale. `,This Weight receiver o Which S deSbl@ Order that ,the S0316 its transversely spaced upstanding portions f may be 0f Compact nature and @Onvement t0 provided with bearing blocks 5 which are handle. y n adapted to receive the knife'edge fulcrum 6 t It iS tllelefOl'e the "OLltStMldlng ObJeCt .0f 4 projecting horizontally and rigidly from `the the resent invention toinjcrease,thecapacity opposite sides ofl a substantially'rectangular 5 Q t, 1S type OfSCal@ WltllOut matlllly 111* beam 7. The fulcrum ris locatedapproxii CreilSIlg the SZ@ thlGOt md t0 PI'OVld@ mately in the center of the length of the beam scale whereby the successive Weighllg C139/ 1 yso that the latter may oscillate to a limited eX- atons thereof maybe Carried out 1n a rapld tent in a vertical plane in the .uual mann-er 40 and accurate 11121D1161- l common to this type of scales. 'l l fm V More Specifically the' 1I1Y3Y1t1011 Consists 111' I Pivotally supported at one end of the beam the .mplOylLeIlt Of all iLUXllliy beam 1H C011* kV7 is a Weight receiver 8, which is adapted for tidn With the lSull beam 0f the S0211@ and the reception of the unknown vveight, that is Q11 WhlCll allXlllaIybetIlil/S POSltlrOlledman ad* t() Say, the Colnnjokdtes 1301)@ r f fscalfe may be increased by the mere shiftis pivoted as usual onthe beam7 'and includes thGI'eOf Vand Vt0l thereby elllkllllafte the the downwardly projecting Stem fer- Y necessity Ofapplvnsand removing 109s@ nmnats 'within thebase 10ft-he' 'sca-1e. A Weighing bodies of" varying Weight check rod lO is pivotally connected at one end so cygnes. y, n I wahiheiower extremity qfthieysimewicle 10@ the other end of the rod 10 is pivotally connected as at 11 with a vertically depending arm 12 unitarily formed with the beam and depending from the yoke 4. A dash pot 13 is stationarily carried by the base of the scale and the reciprocating rod 14 of the dash pot is ivotally connected as at 15 with a cross memer 16 formed with the beam 7.

Provided centrally of the beam 7 is a rigid cross member 17 which also extends through the openings 3 formed in the lower part of the tower 2 and formed in this cross member is an opening 18 for rotatably receiving the reduced and threaded end of a weight adjusting screw 19, the opposite end of the screw being likewise journaled as at 20 in a bearing `formed in a cross brace 21 formed integrally with the outer end of the beam 7. A coil spring 22 may be disposed around the latter end of the screw 19 and serves to exert sufiicient pressure on the screw to maintain the same vstationary against accidental rotation. Formed with the outer end of the screw 19 is a manipulatingr knob 23 for effecting the rotation of the screw. The screw 19 extends longitudinally of the beam 7 and is provided with an extremely coarse thread having a wide lead which provides for the rapid longitudinal shiftingY of an adjustable weight 24 which is carried by the screw 19 and an associated parallel rod 25. By the provision of the screw 19 of the rod 25, the weight 24 may be supported for lengthwise adjustment of the beam. The capacity of the scale may thus be varied by shifting the weight 24 with reference to the pivotal axis of the beam 7. It will be understood that when the weight is positioned adjacent the ivotal center of the beam, the beam will be 1n balance but as the weight is outwardly away from the pivotal center, the beam becomes unbalanced and depressed on the fixed weight side, and the greater the distance the weight 24 is shifted from the pivotal axis kof the beam, the greater the weighing capacity'of the scale will be.

Carried by the beam 7 on the side of the latter opposed to the weight receiver 8 is a chart member 26 and movable over this chart is an index arm 27 which is rigidly secured and carried by the weight 24. The chart is provided with a weight indicating scale 28 and also price computing indicia 29. By the provision of this scale 28 and the indicia 29 the merchant may at a glance determine the setting of the weight 24 and the price per pound of the commodity weighed. If desired the rear surface of the chart 26 may be provided with a similar scale so that the customer may determine the correctness of a given opl ondary weight indicating mechanism comprising a pointer 30 which is rovided with a hub 31. The hub 3l is rovi ed with knife edged trunnions seate within bearings formed in the stationary su porting brackets 32 secured to the side wa s of the tower 2. The hub 31 is formed with a crank arm 33 with which is pivotally connected the upper end of a rod 34 which has its lower end pivotally connected as at 35 to a horizontally extending arm 36 rigidly carried by the outrider of the weight receiver 8. It w1ll be seen that as the beam oscillates, the pointer 30 will rock back and forth over a graduated surface 37 formed in the upper portion of the tower 2 and with its visiblesight opening provided in conjunction with the upper portion of the tower, producing the customa over and under region. Due to the length of the pointer and the manner of effecting its movement, various slight movements on t-he part of the beam will be magnified and rendered clearly visible by reference to the position of the pointer and the graduated surface 37.

While the scale construction just described is admirably suited for the weighing of articles possessin a weight not in excess of three pounds, w ich is the extent of the scale 28 ofthe chart, it hasfbeen found desirable to increase the capacity of the scale by the employment of an auxiliary beam 38 which is arranged within a cavity formed at one end of the scale and ositioned above a foot extension 39 formed integral with the lower portion thereof. The outer end of this foot extension has formed therewith a pair of spaced upstanding lugs 4() which are provided with re istering openings 41 for the reception of c amping screws 42. Attached to the opposed ends of the screws 42 are the ends of a torsional ribbon 43 to which is anchored one end of the beam 38. The beam is held in lace to said ribbon by means of a clamping b ock 44 which is held in place in connection with the end of the beam by means of threaded fastening elements 45. The ends of the ribbon 43, which are anchored to the screws 42 by means of pins 46, are held stretched between the lugs 40 by the adjustment of the screws 42 and which adjustment may be fixed by the locking nuts 47 to prevent axial rotation of the screws 42 while the adjustment is being made the saine is provided with longitudinal slots 48 in which are received the lower ends of set screws 49 threadedly kcarried by the u per end s of the lugs 40. The ribbon 43 w ich serves as the pivotal connection for the auxiliary beam 38 also keeps the auxiliary beam in a substantially horizontal position under normal weighing conditions. Connectin the auxiliary beam with the beam 7 is a linE 50 which has its upper end pivoted toa )rojection 51 formed with the outer end o the beam 7, and its lower end pivoted as at- 52 to the beam 38 and adjacent its pivotal connection.

Mounted for sliding movement upon the beam and shiftable longitudinally thereof is a weight or poise 53 which when arranged adjacent the pivotal connection of the beam, as shown in Figure l, the beam will be in balance but as the weight is moved towards the free end of the beam away from such pivotal connection the beam becomes unbal-y anced and depressed on the fixed weight side 0f th-e scale. The weight 53 in contrast to the weight 24 may be moved quickly upon the beam to various weighing positions and frictionally held in place thereon when the scale is used for weighing commodities in excess of three pounds. In weighing commodities under t-his amount the weight 53 vis not moved from its normal position and the weighing is done only by the shifting of the weight 24. However, when such commodities are in excess of, for example, over five pounds the weight' 53 is moved to the five pound indication, after which the weight 24 is adjusted until the weight finds the commodity of the weight receiver 8. n

In view of the foregoing it will beseen that the present invention provides an even balance weighing scale which while simple in construction, possesses many important,

iliary weighing mechanism which may be brought in use when commodities are to be weighed having a weight in excess of the normal capacity of the scale. This mechanism, which is an auxiliary beam, is so arranged asto be wholly within thefnormal length of the scale or housing and thereby keep the scale within a size for practical and convenient handling thereof. TheY base of the kscale is so formed that ready access may be had to the weight of thek auxiliary beam for its operation and said beam may be viewable equally as well from the customers side of the scale as from the merchants so that the ysetting of the scale may at a glance be determined. The scale is exceptionally sim-.

ple in construction, requires only a few parts for its working and should therefore lend itself readily to manufacturing economy.

What is claimed is:

1. Ina weighing scale, a base, a beam pivotally mounted intermediate its ends on said base, a weight receiver pivotally carried by one end of said beam, a slidable weight carried by the other end of said beam, an auxf iliary beam pivoted on said base, a torsional ribbon 'constituting the pivot for said auxiliary beam, a connecting link between said latter beam and the weight carrying end of said first beam, and a weight slidably positioned upon said auxiliary beam.

'2.In a weighing scale, abase, a beam pivotally mounted centrally thereof on said base, a weight receiver pivotally carried by one end of said beam, a weight carried by the other end of said beam and shiftable longitudinally thereof, a second beam arranged below said first beam and having one end thereof pivoted to said base, the other end of said second beam being'directed towards the pivot of said firstl beam, means for connecting said beams for movement with one another, and a weight slidably positioned upon said second beam.

`3. In a weighing scale, a base, a beam pivotallymounted upon said base, a weight receiver carried by one end of said beam, an

adjustable weight carried kby the other endy of said beam, an auxiliary beam mounted on said base and arranged below said firstmentioned beam, a link connection between the two beams, a weight slidably positioned upon said auxiliary beam, and means for returning said beam to a normal position.

4. In a weighing scale, a base, a beam pivotally mounted intermediate its ends on said base, a weightreceiver pivotally carried by one end of said beam, a shiftable weight carried by the other end of said beam, a second beam of a length substantially half of that `of the first said beam arranged below the latter and lying normally parallel thereto, a pivot connecting the outer end of said second beam with said base, a link connection betweenthe two beams, and a weight slidably positioned upon said second beam.

- In testimony whereof I aflix my signature.

NATHAN A. HALLwooD. 

